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POINTS, LINES AND PLANES. Section 1-1. Jim Smith JCHS. What is Geometry?. Geometry is the study of shapes They studied Geometry in Ancient Mesopotamia & Ancient Egypt Geometry is important in the art and construction fields. POINT.

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Points lines and planes

POINTS, LINES AND PLANES

Section 1-1

Jim Smith JCHS


What is geometry
What is Geometry?

  • Geometry is the study of shapes

  • They studied Geometry in Ancient Mesopotamia & Ancient Egypt

  • Geometry is important in the art and construction fields


Point
POINT

A POINT is an exact location on a graph, shape or in space.

The ball is a POINT on the line.


LINE

A LINE goes in opposite directions and never, ever ends.

Take a pearl necklace and stretch it out.

The pearls are like points on a line.


Plane
PLANE

A PLANE is a flat surface that goes on forever in all directions.

Imagine sitting on an island in the middle of the ocean. No matter which way you look…all you see is water…forever.



To name a line use any 2 points on the line

T

S

R

TO NAME A LINE- USE ANY 2 POINTS ON THE LINE

LINE RT or LINE ST or LINE RS

RT

RS


Points on the same line are called collinear points
POINTS ON THE SAME LINE ARE CALLED COLLINEARPOINTS

A, B, AND Y ARE COLLINEAR

.

.

Y

.

B

A


To name a plane we use 3 or 4 noncollinear points
TO NAME A PLANE WE USE 3 OR 4 NONCOLLINEAR POINTS

PLANE WAG or XAG or WXA

.

.A

Q

X

.W

.G

PLANES CAN BE NAMED USING

1 LETTER …. PLANE Q


The intersection of 2 lines is a point
THE INTERSECTION OF 2 LINES IS A POINT

s

S IS THE INTERSECTION

OF THE 2 LINES



Line xy intersects plane q at point x
LINE XY INTERSECTS PLANE Q AT POINT X

Y

Q

.

X


THE ARROW INTERSECTS

THE TARGET AT 1 POINT


Lines yb and xz do not intersect
Lines YB and XZ do not intersect

Z

.

Y

.

B

X


The intersection of 2 planes is a line
THE INTERSECTION OF 2 PLANES IS A LINE

A

D

G

B

C

E

E

G

H

C

F



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